Objective: The aim of this study is to compare the diagnosis of patients with temporomandibular joint (TMJ)
internal derangements which had been diagnosed using Research Diagnostic Criteria/Temporomandibular
Disorders (RDC/TMD) with the dynamic high‑resolution sonography findings.
Materials and Methods: Axis I section of RDC/TMD form had been applied to participants. Participants were
divided into three groups as healthy TMJ, disc displacement with reduction, and disc displacement without
reduction. The diagnoses had been compared with the dynamic high‑resolution sonography findings. Twelve
of the patients had been treated with laser therapy, whereas 13 patients were treated with stabilization
splint. Seventeen patients were treated with anterior repositioning splint (n = 42). After the application of
different treatment modalities, the position of the articular disc had been determined with Axis I of RDC/
TMD form and dynamic high‑resolution sonography. The findings were compared and statistically analyzed.
Results: For the right TMJ, pretreatment and posttreatment ultrasonography (USG) diagnoses and RDC/
TMD clinical diagnoses were found similar (κ = 0.125–0.008). No statistically significant relationship
was found (P > 0.05). For the left TMJ, pretreatment USG diagnosis and RDC/TMD clinical diagnose were
found similar (κ = 0.070). No statistically significant relationship was found (P > 0.05). For the left TMJ,
posttreatment USG diagnosis and RDC/TMD clinical diagnose were compared. A statistically significant
difference was found (κ = 0.256). A statistically significant relationship was found (P < 0.05).
Conclusion: Axis‑1 of RDC/TMD form which is used for the diagnosis of internal derangements and dynamic
high‑resolution sonography was not found in the agreement.
Keywords: Disk displacement, dynamic high‑resolution sonography, temporomandibular joint